Across the world, Karls (Karls 
, كارلس 
, Карлс 
) is a rare gender-neutral given name. The first name Karls is habitual in Iraq, where it is a rare masculine name, Colombia, where it is a very rare boy's name, and Brazil, where it is an extremely rare female name. More prevalently, Karls is the last name as well as the forename.
Karls is also a prevalent name for the fictitious and mythical characters: Carlos the Scientist , the fictional character from the fiction podcast Welcome to Night Vale; Carlos Oliveira , the ficitional character in Resident Evil, Resident Evil: Extinction; Carlos Alcántara Fernández , the fictional human character, Tell me how it happened; Carlos Mendoza , the fictional character in Volitions video game Saints Row 2 and Carlos Solis , the character from Desperate Housewives, and in many other works.